/** @file

  This library class defines a set of interfaces to customize Ui module

Copyright (c) 2016, Intel Corporation. All rights reserved.<BR>
This program and the accompanying materials are licensed and made available under
the terms and conditions of the BSD License that accompanies this distribution.
The full text of the license may be found at
http://opensource.org/licenses/bsd-license.php.

THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.

**/
#include <Uefi.h>

#include <Guid/MdeModuleHii.h>
#include <Guid/GlobalVariable.h>

#include <Protocol/HiiConfigAccess.h>
#include <Protocol/HiiString.h>

#include <Library/HiiLib.h>
#include <Library/DebugLib.h>
#include <Library/UefiLib.h>
#include <Library/BaseMemoryLib.h>
#include <Library/PcdLib.h>
#include <Library/MemoryAllocationLib.h>
#include <Library/UefiRuntimeServicesTableLib.h>
#include <Library/UefiHiiServicesLib.h>
#include <Library/DevicePathLib.h>
#include <Library/UefiBootServicesTableLib.h>
#include "FrontPageCustomizedUiSupport.h"

//
// This is the VFR compiler generated header file which defines the
// string identifiers.
//
#define PRINTABLE_LANGUAGE_NAME_STRING_ID     0x0001

#define UI_HII_DRIVER_LIST_SIZE               0x8

#define FRONT_PAGE_KEY_CONTINUE               0x1000
#define FRONT_PAGE_KEY_RESET                  0x1001
#define FRONT_PAGE_KEY_LANGUAGE               0x1002
#define FRONT_PAGE_KEY_DRIVER                 0x2000

typedef struct {
  EFI_STRING_ID   PromptId;
  EFI_STRING_ID   HelpId;
  EFI_STRING_ID   DevicePathId;
  EFI_GUID        FormSetGuid;
  BOOLEAN         EmptyLineAfter;
} UI_HII_DRIVER_INSTANCE;

CHAR8                        *gLanguageString;
EFI_STRING_ID                *gLanguageToken;
UI_HII_DRIVER_INSTANCE       *gHiiDriverList;
extern EFI_HII_HANDLE        gStringPackHandle;
UINT8                        gCurrentLanguageIndex;


/**
  Get next language from language code list (with separator ';').

  If LangCode is NULL, then ASSERT.
  If Lang is NULL, then ASSERT.

  @param  LangCode    On input: point to first language in the list. On
                                 output: point to next language in the list, or
                                 NULL if no more language in the list.
  @param  Lang           The first language in the list.

**/
VOID
GetNextLanguage (
  IN OUT CHAR8      **LangCode,
  OUT CHAR8         *Lang
  )
{
  UINTN  Index;
  CHAR8  *StringPtr;

  ASSERT (LangCode != NULL);
  ASSERT (*LangCode != NULL);
  ASSERT (Lang != NULL);

  Index = 0;
  StringPtr = *LangCode;
  while (StringPtr[Index] != 0 && StringPtr[Index] != ';') {
    Index++;
  }

  CopyMem (Lang, StringPtr, Index);
  Lang[Index] = 0;

  if (StringPtr[Index] == ';') {
    Index++;
  }
  *LangCode = StringPtr + Index;
}

/**
  This function processes the language changes in configuration.

  @param Value           A pointer to the data being sent to the original exporting driver.


  @retval  TRUE          The callback successfully handled the action.
  @retval  FALSE         The callback not supported in this handler.

**/
EFI_STATUS
LanguageChangeHandler (
  IN  EFI_IFR_TYPE_VALUE                     *Value
  )
{
  CHAR8                         *LangCode;
  CHAR8                         *Lang;
  UINTN                         Index;
  EFI_STATUS                    Status;

  //
  // Allocate working buffer for RFC 4646 language in supported LanguageString.
  //
  Lang = AllocatePool (AsciiStrSize (gLanguageString));
  ASSERT (Lang != NULL);

  Index = 0;
  LangCode = gLanguageString;
  while (*LangCode != 0) {
    GetNextLanguage (&LangCode, Lang);

    if (Index == Value->u8) {
      gCurrentLanguageIndex = Value->u8;
      break;
    }

    Index++;
  }

  if (Index == Value->u8) {
    Status = gRT->SetVariable (
                    L"PlatformLang",
                    &gEfiGlobalVariableGuid,
                    EFI_VARIABLE_NON_VOLATILE | EFI_VARIABLE_BOOTSERVICE_ACCESS | EFI_VARIABLE_RUNTIME_ACCESS,
                    AsciiStrSize (Lang),
                    Lang
                    );
    if (EFI_ERROR (Status)) {
      FreePool (Lang);
      return EFI_DEVICE_ERROR;
    }
  } else {
    ASSERT (FALSE);
  }
  FreePool (Lang);

  return EFI_SUCCESS;
}

/**
  This function processes the results of changes in configuration.


  @param HiiHandle       Points to the hii handle for this formset.
  @param Action          Specifies the type of action taken by the browser.
  @param QuestionId      A unique value which is sent to the original exporting driver
                         so that it can identify the type of data to expect.
  @param Type            The type of value for the question.
  @param Value           A pointer to the data being sent to the original exporting driver.
  @param ActionRequest   On return, points to the action requested by the callback function.
  @param Status          Return the handle status.

  @retval  TRUE          The callback successfully handled the action.
  @retval  FALSE         The callback not supported in this handler.

**/
BOOLEAN
UiSupportLibCallbackHandler (
  IN  EFI_HII_HANDLE                         HiiHandle,
  IN  EFI_BROWSER_ACTION                     Action,
  IN  EFI_QUESTION_ID                        QuestionId,
  IN  UINT8                                  Type,
  IN  EFI_IFR_TYPE_VALUE                     *Value,
  OUT EFI_BROWSER_ACTION_REQUEST             *ActionRequest,
  OUT EFI_STATUS                             *Status
  )
{
  if (QuestionId != FRONT_PAGE_KEY_CONTINUE &&
      QuestionId != FRONT_PAGE_KEY_RESET &&
      QuestionId != FRONT_PAGE_KEY_LANGUAGE) {
    return FALSE;
  }

  if (Action == EFI_BROWSER_ACTION_RETRIEVE) {
    if (QuestionId == FRONT_PAGE_KEY_LANGUAGE) {
      Value->u8 = gCurrentLanguageIndex;
      *Status = EFI_SUCCESS;
    } else {
      *Status = EFI_UNSUPPORTED;
    }
    return TRUE;
  }

  if (Action != EFI_BROWSER_ACTION_CHANGED) {
    //
    // Do nothing for other UEFI Action. Only do call back when data is changed.
    //
    *Status = EFI_UNSUPPORTED;
    return TRUE;
  }

  if (Action == EFI_BROWSER_ACTION_CHANGED) {
    if ((Value == NULL) || (ActionRequest == NULL)) {
      *Status = EFI_INVALID_PARAMETER;
      return TRUE;
    }

    *Status = EFI_SUCCESS;
    switch (QuestionId) {
    case FRONT_PAGE_KEY_CONTINUE:
      //
      // This is the continue - clear the screen and return an error to get out of FrontPage loop
      //
      *ActionRequest = EFI_BROWSER_ACTION_REQUEST_EXIT;
      break;

    case FRONT_PAGE_KEY_LANGUAGE:
      *Status = LanguageChangeHandler(Value);
      break;

    case FRONT_PAGE_KEY_RESET:
      //
      // Reset
      //
      gRT->ResetSystem (EfiResetCold, EFI_SUCCESS, 0, NULL);
      *Status = EFI_UNSUPPORTED;

    default:
      break;
    }
  }

  return TRUE;
}

/**
  Create Select language menu in the front page with oneof opcode.

  @param[in]    HiiHandle           The hii handle for the Uiapp driver.
  @param[in]    StartOpCodeHandle   The opcode handle to save the new opcode.

**/
VOID
UiCreateLanguageMenu (
  IN EFI_HII_HANDLE              HiiHandle,
  IN VOID                        *StartOpCodeHandle
  )
{
  CHAR8                       *LangCode;
  CHAR8                       *Lang;
  UINTN                       LangSize;
  CHAR8                       *CurrentLang;
  UINTN                       OptionCount;
  CHAR16                      *StringBuffer;
  VOID                        *OptionsOpCodeHandle;
  UINTN                       StringSize;
  EFI_STATUS                  Status;
  EFI_HII_STRING_PROTOCOL     *HiiString;

  Lang         = NULL;
  StringBuffer = NULL;

  //
  // Init OpCode Handle and Allocate space for creation of UpdateData Buffer
  //
  OptionsOpCodeHandle = HiiAllocateOpCodeHandle ();
  ASSERT (OptionsOpCodeHandle != NULL);

  GetEfiGlobalVariable2 (L"PlatformLang", (VOID**)&CurrentLang, NULL);

  //
  // Get Support language list from variable.
  //
  GetEfiGlobalVariable2 (L"PlatformLangCodes", (VOID**)&gLanguageString, NULL);
  if (gLanguageString == NULL) {
    gLanguageString = AllocateCopyPool (
                               AsciiStrSize ((CHAR8 *) PcdGetPtr (PcdUefiVariableDefaultPlatformLangCodes)),
                               (CHAR8 *) PcdGetPtr (PcdUefiVariableDefaultPlatformLangCodes)
                               );
    ASSERT (gLanguageString != NULL);
  }

  if (gLanguageToken == NULL) {
    //
    // Count the language list number.
    //
    LangCode = gLanguageString;
    Lang = AllocatePool (AsciiStrSize (gLanguageString));
    ASSERT (Lang != NULL);

    OptionCount = 0;
    while (*LangCode != 0) {
      GetNextLanguage (&LangCode, Lang);
      OptionCount ++;
    }

    //
    // Allocate extra 1 as the end tag.
    //
    gLanguageToken = AllocateZeroPool ((OptionCount + 1) * sizeof (EFI_STRING_ID));
    ASSERT (gLanguageToken != NULL);

    Status = gBS->LocateProtocol (&gEfiHiiStringProtocolGuid, NULL, (VOID **) &HiiString);
    ASSERT_EFI_ERROR (Status);

    LangCode     = gLanguageString;
    OptionCount  = 0;
    while (*LangCode != 0) {
      GetNextLanguage (&LangCode, Lang);

      StringSize = 0;
      Status = HiiString->GetString (HiiString, Lang, HiiHandle, PRINTABLE_LANGUAGE_NAME_STRING_ID, StringBuffer, &StringSize, NULL);
      if (Status == EFI_BUFFER_TOO_SMALL) {
        StringBuffer = AllocateZeroPool (StringSize);
        ASSERT (StringBuffer != NULL);
        Status = HiiString->GetString (HiiString, Lang, HiiHandle, PRINTABLE_LANGUAGE_NAME_STRING_ID, StringBuffer, &StringSize, NULL);
        ASSERT_EFI_ERROR (Status);
      }

      if (EFI_ERROR (Status)) {
        LangSize = AsciiStrSize (Lang);
        StringBuffer = AllocatePool (LangSize * sizeof (CHAR16));
        ASSERT (StringBuffer != NULL);
        AsciiStrToUnicodeStrS (Lang, StringBuffer, LangSize);
      }

      ASSERT (StringBuffer != NULL);
      gLanguageToken[OptionCount] = HiiSetString (HiiHandle, 0, StringBuffer, NULL);
      FreePool (StringBuffer);

      OptionCount++;
    }
  }

  ASSERT (gLanguageToken != NULL);
  LangCode = gLanguageString;
  OptionCount = 0;
  if (Lang == NULL) {
    Lang = AllocatePool (AsciiStrSize (gLanguageString));
    ASSERT (Lang != NULL);
  }
  while (*LangCode != 0) {
    GetNextLanguage (&LangCode, Lang);

    if (CurrentLang != NULL && AsciiStrCmp (Lang, CurrentLang) == 0) {
      HiiCreateOneOfOptionOpCode (
        OptionsOpCodeHandle,
        gLanguageToken[OptionCount],
        EFI_IFR_OPTION_DEFAULT,
        EFI_IFR_NUMERIC_SIZE_1,
        (UINT8) OptionCount
        );
      gCurrentLanguageIndex = (UINT8) OptionCount;
    } else {
      HiiCreateOneOfOptionOpCode (
        OptionsOpCodeHandle,
        gLanguageToken[OptionCount],
        0,
        EFI_IFR_NUMERIC_SIZE_1,
        (UINT8) OptionCount
        );
    }

    OptionCount++;
  }

  if (CurrentLang != NULL) {
    FreePool (CurrentLang);
  }
  FreePool (Lang);

  HiiCreateOneOfOpCode (
    StartOpCodeHandle,
    FRONT_PAGE_KEY_LANGUAGE,
    0,
    0,
    STRING_TOKEN (STR_LANGUAGE_SELECT),
    STRING_TOKEN (STR_LANGUAGE_SELECT_HELP),
    EFI_IFR_FLAG_CALLBACK,
    EFI_IFR_NUMERIC_SIZE_1,
    OptionsOpCodeHandle,
    NULL
    );
}

/**
  Create continue menu in the front page.

  @param[in]    HiiHandle           The hii handle for the Uiapp driver.
  @param[in]    StartOpCodeHandle   The opcode handle to save the new opcode.

**/
VOID
UiCreateContinueMenu (
  IN EFI_HII_HANDLE              HiiHandle,
  IN VOID                        *StartOpCodeHandle
  )
{
  HiiCreateActionOpCode (
    StartOpCodeHandle,
    FRONT_PAGE_KEY_CONTINUE,
    STRING_TOKEN (STR_CONTINUE_PROMPT),
    STRING_TOKEN (STR_CONTINUE_PROMPT),
    EFI_IFR_FLAG_CALLBACK,
    0
    );
}

/**
  Create empty line menu in the front page.

  @param    HiiHandle           The hii handle for the Uiapp driver.
  @param    StartOpCodeHandle   The opcode handle to save the new opcode.

**/
VOID
UiCreateEmptyLine (
  IN EFI_HII_HANDLE              HiiHandle,
  IN VOID                        *StartOpCodeHandle
  )
{
  HiiCreateSubTitleOpCode (StartOpCodeHandle, STRING_TOKEN (STR_NULL_STRING), 0, 0, 0);
}

/**
  Create Reset menu in the front page.

  @param[in]    HiiHandle           The hii handle for the Uiapp driver.
  @param[in]    StartOpCodeHandle   The opcode handle to save the new opcode.

**/
VOID
UiCreateResetMenu (
  IN EFI_HII_HANDLE              HiiHandle,
  IN VOID                        *StartOpCodeHandle
  )
{
  HiiCreateActionOpCode (
    StartOpCodeHandle,
    FRONT_PAGE_KEY_RESET,
    STRING_TOKEN (STR_RESET_STRING),
    STRING_TOKEN (STR_RESET_STRING),
    EFI_IFR_FLAG_CALLBACK,
    0
    );
}

/**
  Extract device path for given HII handle and class guid.

  @param Handle          The HII handle.

  @retval  NULL          Fail to get the device path string.
  @return  PathString    Get the device path string.

**/
CHAR16 *
ExtractDevicePathFromHiiHandle (
  IN      EFI_HII_HANDLE      Handle
  )
{
  EFI_STATUS                       Status;
  EFI_HANDLE                       DriverHandle;

  ASSERT (Handle != NULL);

  if (Handle == NULL) {
    return NULL;
  }

  Status = gHiiDatabase->GetPackageListHandle (gHiiDatabase, Handle, &DriverHandle);
  if (EFI_ERROR (Status)) {
    return NULL;
  }

  return ConvertDevicePathToText(DevicePathFromHandle (DriverHandle), FALSE, FALSE);
}

/**
  Check whether this driver need to be shown in the front page.

  @param    HiiHandle           The hii handle for the driver.
  @param    Guid                The special guid for the driver which is the target.
  @param    PromptId            Return the prompt string id.
  @param    HelpId              Return the help string id.
  @param    FormsetGuid         Return the formset guid info.

  @retval   EFI_SUCCESS         Search the driver success

**/
BOOLEAN
RequiredDriver (
  IN  EFI_HII_HANDLE              HiiHandle,
  IN  EFI_GUID                    *Guid,
  OUT EFI_STRING_ID               *PromptId,
  OUT EFI_STRING_ID               *HelpId,
  OUT VOID                        *FormsetGuid
  )
{
  EFI_STATUS                  Status;
  UINT8                       ClassGuidNum;
  EFI_GUID                    *ClassGuid;
  EFI_IFR_FORM_SET            *Buffer;
  UINTN                       BufferSize;
  UINT8                       *Ptr;
  UINTN                       TempSize;
  BOOLEAN                     RetVal;

  Status = HiiGetFormSetFromHiiHandle(HiiHandle, &Buffer,&BufferSize);
  if (EFI_ERROR (Status)) {
    return FALSE;
  }

  RetVal = FALSE;
  TempSize = 0;
  Ptr = (UINT8 *) Buffer;
  while(TempSize < BufferSize)  {
    TempSize += ((EFI_IFR_OP_HEADER *) Ptr)->Length;

    if (((EFI_IFR_OP_HEADER *) Ptr)->Length <= OFFSET_OF (EFI_IFR_FORM_SET, Flags)){
      Ptr += ((EFI_IFR_OP_HEADER *) Ptr)->Length;
      continue;
    }

    ClassGuidNum = (UINT8) (((EFI_IFR_FORM_SET *)Ptr)->Flags & 0x3);
    ClassGuid = (EFI_GUID *) (VOID *)(Ptr + sizeof (EFI_IFR_FORM_SET));
    while (ClassGuidNum-- > 0) {
      if (!CompareGuid (Guid, ClassGuid)){
        ClassGuid ++;
        continue;
      }

      *PromptId = ((EFI_IFR_FORM_SET *)Ptr)->FormSetTitle;
      *HelpId = ((EFI_IFR_FORM_SET *)Ptr)->Help;
      CopyMem (FormsetGuid, &((EFI_IFR_FORM_SET *) Ptr)->Guid, sizeof (EFI_GUID));
      RetVal = TRUE;
    }
  }

  FreePool (Buffer);

  return RetVal;
}

/**
  Search the drivers in the system which need to show in the front page
  and insert the menu to the front page.

  @param    HiiHandle           The hii handle for the Uiapp driver.
  @param    ClassGuid           The class guid for the driver which is the target.
  @param    SpecialHandlerFn    The pointer to the specail handler function, if any.
  @param    StartOpCodeHandle   The opcode handle to save the new opcode.

  @retval   EFI_SUCCESS         Search the driver success

**/
EFI_STATUS
UiListThirdPartyDrivers (
  IN EFI_HII_HANDLE              HiiHandle,
  IN EFI_GUID                    *ClassGuid,
  IN DRIVER_SPECIAL_HANDLER      SpecialHandlerFn,
  IN VOID                        *StartOpCodeHandle
  )
{
  UINTN                       Index;
  EFI_STRING                  String;
  EFI_STRING_ID               Token;
  EFI_STRING_ID               TokenHelp;
  EFI_HII_HANDLE              *HiiHandles;
  CHAR16                      *DevicePathStr;
  UINTN                       Count;
  UINTN                       CurrentSize;
  UI_HII_DRIVER_INSTANCE      *DriverListPtr;
  EFI_STRING                  NewName;
  BOOLEAN                     EmptyLineAfter;

  if (gHiiDriverList != NULL) {
    FreePool (gHiiDriverList);
  }

  HiiHandles = HiiGetHiiHandles (NULL);
  ASSERT (HiiHandles != NULL);

  gHiiDriverList = AllocateZeroPool (UI_HII_DRIVER_LIST_SIZE * sizeof (UI_HII_DRIVER_INSTANCE));
  ASSERT (gHiiDriverList != NULL);
  DriverListPtr = gHiiDriverList;
  CurrentSize = UI_HII_DRIVER_LIST_SIZE;

  for (Index = 0, Count = 0; HiiHandles[Index] != NULL; Index++) {
    if (!RequiredDriver (HiiHandles[Index], ClassGuid, &Token, &TokenHelp, &gHiiDriverList[Count].FormSetGuid)) {
      continue;
    }

    String = HiiGetString (HiiHandles[Index], Token, NULL);
    if (String == NULL) {
      String = HiiGetString (gStringPackHandle, STRING_TOKEN (STR_MISSING_STRING), NULL);
      ASSERT (String != NULL);
    } else if (SpecialHandlerFn != NULL) {
      //
      // Check whether need to rename the driver name.
      //
      EmptyLineAfter = FALSE;
      if (SpecialHandlerFn (String, &NewName, &EmptyLineAfter)) {
        FreePool (String);
        String = NewName;
        DriverListPtr[Count].EmptyLineAfter = EmptyLineAfter;
      }
    }
    DriverListPtr[Count].PromptId = HiiSetString (HiiHandle, 0, String, NULL);
    FreePool (String);

    String = HiiGetString (HiiHandles[Index], TokenHelp, NULL);
    if (String == NULL) {
      String = HiiGetString (gStringPackHandle, STRING_TOKEN (STR_MISSING_STRING), NULL);
      ASSERT (String != NULL);
    }
    DriverListPtr[Count].HelpId = HiiSetString (HiiHandle, 0, String, NULL);
    FreePool (String);

    DevicePathStr = ExtractDevicePathFromHiiHandle(HiiHandles[Index]);
    if (DevicePathStr != NULL){
      DriverListPtr[Count].DevicePathId = HiiSetString (HiiHandle, 0, DevicePathStr, NULL);
      FreePool (DevicePathStr);
    } else {
      DriverListPtr[Count].DevicePathId = 0;
    }

    Count++;
    if (Count >= CurrentSize) {
      DriverListPtr = AllocateCopyPool ((Count + UI_HII_DRIVER_LIST_SIZE) * sizeof (UI_HII_DRIVER_INSTANCE), gHiiDriverList);
      ASSERT (DriverListPtr != NULL);
      FreePool (gHiiDriverList);
      gHiiDriverList = DriverListPtr;
      CurrentSize += UI_HII_DRIVER_LIST_SIZE;
    }
  }

  FreePool (HiiHandles);

  Index = 0;
  while (gHiiDriverList[Index].PromptId != 0) {
    HiiCreateGotoExOpCode (
      StartOpCodeHandle,
      0,
      gHiiDriverList[Index].PromptId,
      gHiiDriverList[Index].HelpId,
      0,
      (EFI_QUESTION_ID) (Index + FRONT_PAGE_KEY_DRIVER),
      0,
      &gHiiDriverList[Index].FormSetGuid,
      gHiiDriverList[Index].DevicePathId
    );

    if (gHiiDriverList[Index].EmptyLineAfter) {
      UiCreateEmptyLine (HiiHandle, StartOpCodeHandle);
    }

    Index ++;
  }

  return EFI_SUCCESS;
}